Calcium charge distribution

Figure 11b show a skewed conformation for such a trimer found in the mineral kilchoanite that is best formulated as Cae( Si04)( S130jq) [154]. Besides this skewed trimer an isolated monomer is found which displays a partial charge distribution very similar to that found in orthosilicate structures. The calcium-atoms have nearly their Ml ionic charge but in contrast to the... 

G. zu Putlitz, Nuclear Charge Distribution of Eight Ca - Nuclei by Laser Spectroscopy, Z. Phys. A294 319 (1980) M. Arnold, E. Bergmann, P. Bopp, C. Dorsch, J. Kowalski, T. Stehlin, F. Trager, G. zu Putlitz, Hyperfine structure and nuclear moments of odd calcium isotopes by laser and radiofrequency spectroscopy, Hyperfine Inter. 9 159 (1981) C.W.P. Palmer, P.E.G. 

B.A. Brown, S.E. Massen, P.E. Hodgson, The charge distributions of the oxygen and calcium isotopes, Phys. Lett. 85B 167... 

Ruggiero, ]., Fossey, M. A., Santos, J. A., Mourao, P.A. S. (1998). Charge distribution and calcium affinity of sulfated Ot-L-galactans from ascidians. Comparison between linear and highly branched polymers. Carbohydrate Research, 306, 545-550. 

Calcium carbonate (CaC03) occurs naturally as calcite (density 2.7), a widely distributed mineral. Calcite is a common constituent of sedimentary rocks, as a vein mineral, and as deposits from hot springs and in caves as stalactites and stalagmites. Calcite is white or colorless through shades of gray, red, yellow, green, blue, violet, brown, or even black when charged with impurities streaked, white transparent to opaque. It may occasionally show phosphorescence or fluorescence. 

Fig. 11a,b. Ion arrival time distributions of charge states +7 and -7 of the calcium-free protein calmodulin (T=300 K,p=4.9 torr, VD=90 V, drift length 4.5 cm). For +7 two distinctly different families of structures are present, one with larger cross sections (main peak) and one with smaller cross sections (shoulder to the left). The broad peak for -7 indicates an even distribution of structures with smaller and larger cross sections... 

Figure 4 The electrostatic distributions of a-lactalbumin (lALC) (a) and chicken egg-white lysozyme (ILZl) (b) calculated by Delphi and presented by Grasp. Both surfaces of calcium-binding protein a-lactalbumin are mostly negatively charged (a) (in red) while the surfaces of noncalcium binding protein lysozyme (b) are mostly positively charged (in blue)...

---